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The Cathedral of Eternal Night can be found on the top of the Tomb of Sargeras in the newly revamped Broken Shore zone. In this new dungeon, you’ll assist Illidan and Maiev in making sure that the Aegis of Aggramar, one of the five Pillars of Creation, is properly sealed to help protect the Broken Shore against the Legion. We’ve created this dungeon preview and guide to prepare you for what’s to come in the Cathedral of Eternal Night.

Boss Strategies

Agronox
Agronox once served the night elf priestesses at the Temple of Elune, but became corrupted after the Legion invaded the cathedral.

Abilities

Originally Posted by MMO-Champion

The upper chambers of the Tomb of Sargeras were once a place of worship to Elune. Since the Legion's invasion, fel minions have desecrated this holy place, twisting it into their own image. Now, this site will host a battle that could turn the tide of the invasion. While the Armies of Legionfall engage the fel army directly, a small group of heroes infiltrates the upper reaches of the cathedral in a desperate hope to return the Aegis of Aggramar to its resting place.

Agronox
This ancient served the night elves priestesses of the Temple of Elune, tending the beautiful Hanging Gardens. But after the malevolence of the Legion infected the Cathedral, the guardian absorbed fel energy through his roots. Now the twisted Agronox spreads corruption throughout the sanctuary he once protected, believing he has finally achieved his ideal state.

Overview - Agronox corrupts the garden he once tended and turns it against players. Quickly defeat his Lasher minions to avoid being overwhelmed. Run from Choking Vines before you are strangled. Poisonous Spores inflict increasing amounts of damage over time. On Mythic difficulty, Agronox summons Nourishing Lashers and restores his health via Nature's Infusion.

Damage Dealers -

Defeat Fulminating Lashers and Succulent Lashers quickly, to keep the party from being overrun.

Position Succulent Lashers such that Toxic Sap can be avoided by party members.

Defeat Fulminating Lashers and Succulent Lashers quickly, to keep the party from being overrun.

Tanks -

Position Succulent Lashers such that Toxic Sap can be avoided by party members.

Defeat Fulminating Lashers and Succulent Lashers quickly, to keep the party from being overrun.

Poisonous Spores - The fauna of the Hanging Gardens erupt in a colorful but deadly cloud, inflicting 26,000 Nature damage every 2 sec. This effect stacks.

Timber Smash - With a slam of his mighty bark-covered fists, Agronox deals 2,750,000 Physical damage to his current target and knocks them back.

Choking Vines - Vines lash to the throat of a player inflicting 195,000 Nature damage every second until they are more than 20 yards from the deadly bloom. This effect increases by 10% with every tick.

Fulminating Lashers - Agronox calls forth a swarm of explosive Fulminating Lashers from the dense fauna of the Fel Gardens.

Thrashbite the Scornful
Smashspite's detestable brother, Thrashbite, has been dispatched to wipe out the mortals entering the cathedral's grand library. The dimwitted mo'arg lacks any respect for knowledge or learning, feeling petty satisfaction as he crashes through ancient artifacts and tramples priceless tomes.

Overview - Thrashbite the Scornful favors imprecise, sweeping attacks with little regard for his surroundings. Trick him into going toe to toe with something thicker than himself, though, and he just might lose his balance. Beware: this ancient library contains many magical tomes with unpredictable enchantments! On Mythic difficulty, Thrashbite unleashes the powers of the Wondrous Library each time he collides with a bookcase, bringing ancient animated tomes into the fray.

Domatrax
With the Aegis of Aggramar socketed back into its cradle, Domatrax leads an onslaught of demons to destroy the relic.

Overview - Upon reaching 90% and 50% health, the Fel Lord opens up additonal portals to allow greater numbers of the Legion's soldiers to pour into the tomb. The Aegis of Aggramar provides protection against the Legion's attacks, but if drained of all its energy, this aura will fall. On Mythic difficulty, if the Fel Portal Guardians are not destroyed within a specific time, an overfiend emerges.

Aegis of Aggramar - The Aegis of Aggramar protects all allies within its radius by reducing damage received by 90% but also reduces damage inflicted by 75% and healing done by 75%.Getting hit by Felsoul Cleave or standing within the Aegis' protection drains the shield over time.

Stage One: The March of the Imps - Upon reaching 90% health, Domatrax tears open portals allowing imps to enter the fray.

Hellblaze Imp -

Fel Blast - Fires a fel blast at a random enemy, inflicting 705,950 Fire damage to all enemies within 4 yards of the impact.

Searing Rend - Inflicts 1,235,000 Fire damage to all enemies in a cone within 10 yards in front of the caster and leaves fire puddles in the area that inflict 70,000 Fire damage every 1 sec.

Hellblaze Mistress -

Shadow Sweep - Inflicts 1,200,000 Shadow damage to enemies within melee distance of the caster and knocks them back.

Mephistroth
Mephistroth orchestrates the Legion's invasion from the Broken Shores. With the forces of Azeroth pushing against his front line, Mephistroth has fallen back to the Cathedral of Eternal Night, where he will employ all his cunning to ensure the heroes fail in securing the Aegis of Agrammar.

Overview - Mephistroth uses shadow magic to attack the party until he reaches 100% energy. Once his energy is full, Mephistroth fades away and strikes at the heroes from the shadows. During this, Illidan must be protected with the Aegis of Aggramar long enough for him to pull the dreadlord back into the light. On Mythic difficulty, fel bats fly in through the windows during Shadow Fade and assault the heroes with Fel Blaze.

Aegis of Aggramar - Face the Aegis of Agrammar towards Shadows of Mephistroth to protect Illidan from Shadow Blast.

Stage One: Mephistroth -

Carrion Swarm - A cresting wave of chaotic magic splashes over enemies in front of the caster, dealing 1,260,000 Shadow damage. It also leaves shadow puddles in the area that inflict 70,000 Shadow damage every 1 sec.

Demonic Upheaval - Hurls fel energy at random enemies that places an aura on the targets. When the aura expires, a Fel Spike erupts at the destination, inflicting 1,095,000 Fire damage to nearby enemies and knocking them back as well as inflicting 648,450 Fire damage to enemies within 18 yards.

Demonic Upheaval - Hurls fel energy at random enemies that places an aura on the targets. When the aura expires, a Fel Spike erupts at the destination, inflicting 1,095,000 Fire damage to nearby enemies and knocking them back as well as inflicting 648,450 Fire damage to all enemies.

Dark Solitude - Hurls dark energy at random enemies that inflicts 320,000 Shadow damage to all nearby enemies and places a debuff on the target that inflicts an additional 109,200 Shadow damage every 1 sec. for 8 sec.

Stage Two: Fades to Shadow -

Shadow Fade - Mephistroth fades into the shadows becoming invisible until Illidan can complete his Expel Shadows cast. While in this phase, Shadows of Mephistroth continually appear to assault Illidan to prevent Expel Shadows from being cast.

Creeping Shadows - As long as Mephistroth remains in the shadows, the party suffers 20,000 Shadow damage per stack every 1 sec.

Illidan Stormrage - Appears during stage two and attempts to reveal Mephistroth.